Move route_show_if into decorators

Also removes unused route_hide_if

endpoints/decorators.py

@@ -38,3 +38,17 @@ def check_anon_protection(func):
 
     abort(401)
   return wrapper
+
+
+def route_show_if(value):
+  """ Adds/shows the decorated route if the given value is True. """
+  def decorator(f):
+    @wraps(f)
+    def decorated_function(*args, **kwargs):
+      if not value:
+        abort(404)
+
+      return f(*args, **kwargs)
+    return decorated_function
+  return decorator
+